Luxol fast blue is a water soluble dye.

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Multiple Choice

Luxol fast blue is a water soluble dye.

Explanation:
Luxol fast blue is used to stain myelin and must be dissolved in organic solvents, not water. In routine practice the dye is prepared in an alcohol-based solution (often 95% ethanol) and sometimes with copper sulfate to enhance staining. Because it relies on alcohol-soluble solvent rather than water, the statement that it is water soluble is not correct. The dye binds to the lipid-rich myelin to produce a blue stain, rather than dissolving the lipids themselves.

Luxol fast blue is used to stain myelin and must be dissolved in organic solvents, not water. In routine practice the dye is prepared in an alcohol-based solution (often 95% ethanol) and sometimes with copper sulfate to enhance staining. Because it relies on alcohol-soluble solvent rather than water, the statement that it is water soluble is not correct. The dye binds to the lipid-rich myelin to produce a blue stain, rather than dissolving the lipids themselves.

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